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Finding the Fourth Proportional to 611,688.80, 915,718.80 and 454,613.60

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Solution

The fourth proportional to 611,688.80, 915,718.80 and 454,613.60 is: 680,571.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,688.80 : 915,718.80 = 454,613.60 : x
  2. Step 2: Convert to fraction form
    611,688.80/915,718.80 = 454,613.60/x
  3. Step 3: Cross multiply
    611,688.80x = 915,718.80 × 454,613.60
  4. Step 4: Simplify right side
    611,688.80x = 416,298,220,255.68
  5. Step 5: Solve for x
    x = 416,298,220,255.68/611,688.80
  6. Step 6: Final answer
    x = 680,571.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.